By using Claude Fable 5, you consent to data retention for purposes of monitoring safe and compliant use of AI. Anthropic's data retention policy does not allow zero data retention. Learn more(opens in new tab)
This model always redirects to the latest model in the Claude Fable family.
This model always redirects to the latest model in the Claude Fable family.
Claude Fable Latest costs $10.00/M input tokens and $50.00/M output tokens, with separate rates for Cache Read at $1.00/M tokens, Cache Write at $12.50/M tokens, Cache Write (1h) at $20.00/M tokens and Web Search at $10.00/1K calls.
Claude Fable Latest has a 1,000,000 token context window. It supports up to 128,000 completion tokens.
Yes. Claude Fable Latest accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
Claude Fable Latest accepts text, images and files such as PDFs as input and returns text.
Claude Opus 5 (Fast), Claude Opus 5, Claude Sonnet 5 and 13 more are other text models from Anthropic.
Claude Fable Latest was released on June 9, 2026.
Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.
